USBAlternateInterface
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The USBAlternateInterface
interface of the WebUSB API provides information about a particular configuration of an interface provided by the USB device. An interface includes one or more alternate settings which can configure a set of endpoints based on the operating mode of the device.
Constructor
USBAlternateInterface()
-
Creates a new
USBAlternateInterface
object which will be populated with information about the alternate interface of the providedUSBInterface
with the given alternate setting number.
Properties
USBAlternateInterface.alternateSetting
Read only-
Returns the alternate setting number of this interface. This is equal to the
bAlternateSetting
field of the interface descriptor defining this interface. USBAlternateInterface.interfaceClass
Read only-
Returns the class of this interface. This is equal to the
bInterfaceClass
field of the interface descriptor defining this interface. Standardized values for this field are defined by the USB Implementers Forum. A value of0xFF
indicates a vendor-defined interface. USBAlternateInterface.interfaceSubclass
Read only-
Returns the subclass of this interface. This is equal to the
bInterfaceSubClass
field of the interface descriptor defining this interface. The meaning of this value depends on theinterfaceClass
field. USBAlternateInterface.interfaceProtocol
Read only-
Returns the protocol supported by this interface. This is equal to the
bInterfaceProtocol
field of the interface descriptor defining this interface. The meaning of this value depends on theinterfaceClass
andinterfaceSubclass
fields. USBAlternateInterface.interfaceName
Read only-
Returns the name of the interface, if one is provided by the device. This is the value of the string descriptor with the index specified by the
iInterface
field of the interface descriptor defining this interface. USBAlternateInterface.endpoints
Read only-
Returns an array containing instances of the
USBEndpoint
interface describing each of the endpoints that are part of this interface.
Specifications
Specification |
---|
WebUSB API # usbalternateinterface |
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